1–20 von 23 Ergebnissen
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    Toward prediction of dual-stream jet noise: Database generation

    Viswanathan, K. / Czech, M.J. / Lee, I.C. | Tema Archiv | 2011
    Accurate prediction of jet noise from dual-stream nozzle exhaust geometries typical of high bypass ratio turbofan engines has practical ...

    Smart double panel for the sound radiation control: Blended velocity feedback

    Alujevic, Neven / Gardonio, Paolo / Frampton, Kenneth D. | Tema Archiv | 2011
    An active damping method using blended velocity feedback for the reduction of sound transmission through a simplified aircraft double panel ...

    Surrogate modeling for uncertainty assessment with application to aviation environmental system models

    Allaire, D. / Willcox, K. | Tema Archiv | 2010
    surrogate predictions. The approach is developed for a general class of models and is demonstrated on an aircraft emissions prediction model that is ...

    Numerical prediction of exhaust fan-tone noise from high-bypass aircraft engines

    Sharma, Anupam / Richards, Simon K. / Wood, Trevor H. et al. | Tema Archiv | 2009
    The ability to accurately predict fan noise is important in designing and optimizing high-bypass aircraft engines for low noise emissions ...

    Experimental validation of the active noise control methodology based on difference potentials

    Lim, H. / Utyuzhnikov, S.V. / Lam, Y.W. et al. | Tema Archiv | 2009
    To achieve active noise cancellation over a large area, it is often necessary to get a measure of the physical properties of the noise ...

    External mean flow influence on noise transmission through double-leaf aeroelastic plates

    Xin, F.X. / Lu, T.J. / Chen, C.Q. | Tema Archiv | 2009
    The transmission of external jet noise through the double-leaf skin plate of an aircraft cabin fuselage in the presence of external mean ...

    Plasma actuators for cylinder flow control and noise reduction

    Thomas, Flint O. / Kozlov, Alexey / Corke, Thomas C. | Tema Archiv | 2008
    In this paper, the results of flow-control experiments using single dielectric barrier discharge plasma actuators to control flow ...

    Low-frequency acoustic shielding by the silent aircraft airframe

    Agarwal, Anurag / Dowling, Ann P. | Tema Archiv | 2007
    The 'Silent Aircraft Initiative' is a project funded by the Cambridge-MIT Institute (CMI). Its aim is to discover ways of reducing aircraft ...

    Measurement and prediction of noise propagation from a high-power jet aircraft

    Gee, Kent L. / Sparrow, Victor W. / James, Michael M. et al. | Tema Archiv | 2007
    the deployment of next-generation fighter aircraft. An amplitude-dependent wave speed, neglected as part of linear acoustics assumptions ...

    Assessment of the contribution of surface roughness to airframe noise

    Liu, Yu / Dowling, Ann P. | Tema Archiv | 2007
    Boeing 757 sized aircraft wing with idealized levels of surface roughness show that in the high-frequency region the sound radiated from surface ...

    Numerical analysis of airframe noise scattering effects in tilt-rotor systems

    Casalino, Damiano / Genito, Mariano / Visingardi, Antonio | Tema Archiv | 2007
    The present paper illustrates a computational aeroacoustic method for evaluating the effects of airframe scattering on the noise generated ...

    Unsteady flowfield around tandem cylinders as prototype component interaction in airframe noise

    Khorrami, Mehdi R. / Choudhari, Meelan M. / Lockard, David P. et al. | Tema Archiv | 2007
    The current effort characterizes the details of flow interactions and wake interference effects between two cylinders in a tandem ...

    Green's functions for the acoustic field in lined ducts with uniform flow

    Alonso, Jose S. / Burdisso, Ricardo A. | Tema Archiv | 2007
    on aircraft engines is expected to continue. This paper presents the analytical modeling of the radiation of sound from a moving boundary ...

    Prediction method for broadband noise from unsteady flow in a slat cove

    Agarwal, Anurag / Morris, Philip J. | Tema Archiv | 2006
    Noise from high-lift devices such as slats and flaps can contribute significantly to the overall aircraft sound pressure levels ...

    Framework for aircraft conceptual design and environmental performance studies

    Antoine, Nicolas E. / Kroo, Ilan M. | Tema Archiv | 2005
    Although civil aircraft environmental performance has been important since the beginnings of commercial aviation, continuously increasing ...

    Controller complexity for active control of turbulent boundary-layer noise from panels

    Gibbs, Gary P. / Cabell, Randolph H. / Juang, Jer-Nan | Tema Archiv | 2004
    An experimental study of feedback controller complexity vs noise reduction performance for active structural acoustic control of turbulent ...

    Active control of the flow-induced noise transmitted through a panel

    Maury, C. / Gardonio, P. / Elliott, S.J. | Tema Archiv | 2001
    the control within an aircraft cabin of the flow-induced noise due to the wall pressure fluctuations over the fuselage. The excitation is ...

    Stability analysis for noise-source modeling of a part-span flap

    Khorrami, M.R. / Singer, B.A. | Tema Archiv | 1999
    With the design of modern quiet jet engines, the airframe-generated noise of civil transports has become a major concern for noise ...

    Active structural acoustic control of noise transmission through double panel systems

    Carneal, J.P. / Fuller, C.R. | Tema Archiv | 1995
    , modeling the interior trim of an aircraft. The application of control inputs to the interior trim (radiating panel) has distinct advantages. There ...

    Active control of interior noise in model aircraft fuselages using piezoceramic actuators

    Fuller, C.R. / Snyder, S.D. / Hansen, C.H. et al. | Tema Archiv | 1992